Display device using semiconductor light emitting element

Abstract

The present invention relates to a display device and, more particularly, to a display device using a semiconductor light emitting element. The display device according to the present invention comprises a light emitting element module, wherein the light emitting element module comprises: a red semiconductor light emitting element that emits red light; a green semiconductor light emitting element that is disposed on the top surface of the red semiconductor light emitting element; a blue semiconductor light emitting element that is disposed on the top surface of the green semiconductor light emitting element; an individual electrode portion for supplying an individual signal to each of the red semiconductor light emitting element, the green semiconductor light emitting element, and the blue semiconductor light emitting element; and a common electrode portion for supplying a common signal to the red semiconductor light emitting element, the green semiconductor light emitting element, and the blue semiconductor light emitting element.

The invention claimed is: 
     
       1. A display device comprising:
 a light emitting element module on a substrate, 
 wherein the light emitting element module includes:
 a red semiconductor light emitting element that emits a red light; 
 a green semiconductor light emitting element that is disposed on top of the red semiconductor light emitting element and emits a green light; 
 a blue semiconductor light emitting element that is disposed on top of the green semiconductor light emitting element and emits a blue light; 
 an individual electrode portion that supplies an individual signal to each of the red semiconductor light emitting element, the green semiconductor light emitting element, and the blue semiconductor light emitting element, respectively; 
 a common electrode portion that supplies a common signal to all of the red semiconductor light emitting element, the green semiconductor light emitting element, and the blue semiconductor light emitting element; 
 a first distributed Bragg reflector (DBR) disposed between the red semiconductor light emitting element and the green semiconductor light emitting element, wherein the first DBR transmits the red light and reflects the green light; 
 a second distributed Bragg reflector (DBR) disposed between the green semiconductor light emitting element and the blue semiconductor light emitting element, wherein the second DBR transmits the green and red lights, and reflects the blue light; and 
 a third distributed Bragg reflector (DBR) that reflects the red light, or a metal mirror, wherein the third DBR or the metal mirror is disposed below the red semiconductor light emitting element. 
 
 
     
     
       2. The display device of  claim 1 , further comprising a first light transmittance adhesive layer that is disposed to cover the red semiconductor light emitting element,
 wherein the green semiconductor light emitting element is attached to the first light transmittance adhesive layer. 
 
     
     
       3. The display device of  claim 2 , wherein the individual electrode portion includes a green electrode portion electrically connected to the green semiconductor light emitting element, and a red electrode portion electrically connected to the red semiconductor light emitting element,
 wherein the red electrode portion is covered by the first light transmittance adhesive layer. 
 
     
     
       4. The display device of  claim 2 , further including a second light transmittance adhesive layer that is disposed to cover the green semiconductor light emitting element, and
 wherein the blue semiconductor light emitting element is attached to the second light transmittance adhesive layer. 
 
     
     
       5. The display device of  claim 4 , wherein the second light transmittance adhesive layer is extended toward the red semiconductor light emitting element to cover the first light transmittance adhesive layer. 
     
     
       6. The display device of  claim 4 , wherein the individual electrode portion includes a green electrode portion electrically connected to the green semiconductor light emitting element, and
 wherein the green electrode portion is extended along one side of an adhesive layer of the first light transmittance adhesive layer. 
 
     
     
       7. The display device of  claim 6 , wherein the green electrode portion is covered by the second light transmittance adhesive layer. 
     
     
       8. The display device of  claim 4 , wherein the individual electrode portion includes a blue electrode portion electrically connected to the blue semiconductor light emitting element, and
 wherein the blue electrode portion is extended along one side of an adhesive layer of the second light transmittance adhesive layer. 
 
     
     
       9. The display device of  claim 1 , wherein the red semiconductor light emitting element, the green semiconductor light emitting element and the blue semiconductor light emitting element each includes a first conductive semiconductor layer, a second semiconductor layer overlapped with the first conductive semiconductor layer, and an active layer disposed between the first semiconductor layer and the second semiconductor layer, respectively. 
     
     
       10. The display device of  claim 1 , wherein a size of an area of the green semiconductor light emitting element is smaller than that of the red semiconductor light emitting element, and
 a size of an area of the blue semiconductor light emitting element is smaller than that of the green semiconductor light emitting element. 
 
     
     
       11. The display device of  claim 1 , wherein the light emitting element module is one of a plurality of light emitting element modules that are sequentially arranged along directions of columns and rows on the substrate. 
     
     
       12. A display device comprising:
 a light emitting element module on a substrate, 
 wherein the light emitting element module includes:
 a red semiconductor light emitting element that emits a red light; 
 a green semiconductor light emitting element that is disposed on top of the red semiconductor light emitting element and emits a green light; 
 a blue semiconductor light emitting element that is disposed on top of the green semiconductor light emitting element and emits a blue light: 
 an individual electrode portion that supplies an individual signal to each of the red semiconductor light emitting element, the green semiconductor light emitting element, and the blue semiconductor light emitting element, respectively; and 
 a common electrode portion that supplies a common signal to all of the red semiconductor light emitting element, the green semiconductor light emitting element, and the blue semiconductor light emitting element, 
 
 wherein the individual electrode portion includes a red electrode portion, a green electrode portion and a blue electrode portion each electrically connected to the red semiconductor light emitting element, the green semiconductor light emitting element and the blue semiconductor light emitting element, respectively, and 
 wherein the red electrode portion, the green electrode portion and the blue electrode portion are disposed on different sides of the light emitting element module. 
 
     
     
       13. The display device of  claim 12 , wherein the common electrode portion is disposed on a side of the light emitting element module where the red electrode portion, the green electrode portion and the blue electrode portion are not disposed. 
     
     
       14. A light emitting element module, comprising:
 a red semiconductor light emitting element that emits a red light; 
 a green semiconductor light emitting element that is disposed on top of the red semiconductor light emitting element and emits a green light; 
 a blue semiconductor light emitting element that is disposed on top of the green semiconductor light emitting element and emits a blue light; 
 an individual electrode portion that supplies an individual signal to each of the red semiconductor light emitting element, the green semiconductor light emitting element, and the blue semiconductor light emitting element, respectively; and 
 a common electrode portion that supplies a common signal to all of the red semiconductor light emitting element, the green semiconductor light emitting element, and the blue semiconductor light emitting element, 
 wherein the individual electrode portion includes a red electrode portion, a green electrode portion and a blue electrode portion each connected to the red semiconductor light emitting element, the green semiconductor light emitting element and the blue semiconductor light emitting element, respectively, and 
 wherein the red electrode portion, the green electrode portion and the blue electrode portion are disposed on different sides of the light emitting element module. 
 
     
     
       15. The light emitting element module of  claim 14 , further comprising a first distributed Bragg reflector (DBR) disposed between the red semiconductor light emitting element and the green semiconductor light emitting element,
 wherein the first DBR transmits the red light and reflects the green light. 
 
     
     
       16. The light emitting element module of  claim 15 , further comprising a second distributed Bragg reflector (DBR) disposed between the green semiconductor light emitting element and the blue semiconductor light emitting element,
 wherein the second DBR transmits the green and red lights and reflects the blue light.